Defeats the object
Rather defeats the object of the exercise, doesn't it? Nice, environmentally-friendly car that makes a non-environmentally-friendly noise? Hmm........dread to think what might happen if tech-savvy kids manage to pimp up their leccy cars. It's bad enough now, with their so-called car hi-fi booming away, with the doors bulging outwards on every bass note!
There has to be a better way - some sort of transmitter/receiver device to say where the car is for blind folk maybe, although I suppose if there were loads of leccy cars in the area, that wouldn't work. Doh! In any case, can blind people tell where all the conventional vehicles are in the street? Would all the leccy cars sound the same? That could be confusing. Have they had problems in the past locating silent cycles or existing electric vehicles?
Sounds like some politician is trying to make a name for themselves.